diff options
Diffstat (limited to 'ogp_spi.c')
| -rw-r--r-- | ogp_spi.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/ogp_spi.c b/ogp_spi.c new file mode 100644 index 0000000..fb52a8c --- /dev/null +++ b/ogp_spi.c @@ -0,0 +1,145 @@ +/* + * This file is part of the flashrom project. + * + * Copyright (C) 2010 Mark Marshall + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <stdlib.h> +#include <string.h> +#include "flash.h" +#include "programmer.h" + +#define PCI_VENDOR_ID_OGP 0x1227 + +/* These are the register addresses for the OGD1 / OGA1. If they are + * different for later versions of the hardware then we will need + * logic to select between the different hardware versions. */ +#define OGA1_XP10_BPROM_SI 0x0040 /* W */ +#define OGA1_XP10_BPROM_SO 0x0040 /* R */ +#define OGA1_XP10_BPROM_CE_BAR 0x0044 /* W */ +#define OGA1_XP10_BPROM_SCK 0x0048 /* W */ +#define OGA1_XP10_BPROM_REG_SEL 0x004C /* W */ +#define OGA1_XP10_CPROM_SI 0x0050 /* W */ +#define OGA1_XP10_CPROM_SO 0x0050 /* R */ +#define OGA1_XP10_CPROM_CE_BAR 0x0054 /* W */ +#define OGA1_XP10_CPROM_SCK 0x0058 /* W */ +#define OGA1_XP10_CPROM_REG_SEL 0x005C /* W */ + +static uint8_t *ogp_spibar; + +static uint32_t ogp_reg_sel; +static uint32_t ogp_reg_siso; +static uint32_t ogp_reg__ce; +static uint32_t ogp_reg_sck; + +const struct pcidev_status ogp_spi[] = { + {PCI_VENDOR_ID_OGP, 0x0000, OK, "Open Graphics Project", "Development Board OGD1"}, + {}, +}; + +static void ogp_request_spibus(void) +{ + pci_mmio_writel(1, ogp_spibar + ogp_reg_sel); +} + +static void ogp_release_spibus(void) +{ + pci_mmio_writel(0, ogp_spibar + ogp_reg_sel); +} + +static void ogp_bitbang_set_cs(int val) +{ + pci_mmio_writel(val, ogp_spibar + ogp_reg__ce); +} + +static void ogp_bitbang_set_sck(int val) +{ + pci_mmio_writel(val, ogp_spibar + ogp_reg_sck); +} + +static void ogp_bitbang_set_mosi(int val) +{ + pci_mmio_writel(val, ogp_spibar + ogp_reg_siso); +} + +static int ogp_bitbang_get_miso(void) +{ + uint32_t tmp; + + tmp = pci_mmio_readl(ogp_spibar + ogp_reg_siso); + return tmp & 0x1; +} + +static const struct bitbang_spi_master bitbang_spi_master_ogp = { + .type = BITBANG_SPI_MASTER_OGP, + .set_cs = ogp_bitbang_set_cs, + .set_sck = ogp_bitbang_set_sck, + .set_mosi = ogp_bitbang_set_mosi, + .get_miso = ogp_bitbang_get_miso, + .request_bus = ogp_request_spibus, + .release_bus = ogp_release_spibus, +}; + +int ogp_spi_init(void) +{ + char *type; + + type = extract_programmer_param("rom"); + + if (!type) { + msg_perr("Please use flashrom -p ogp_spi:rom=... to specify " + "which flashchip you want to access.\n"); + return 1; + } else if (!strcasecmp(type, "bprom") || !strcasecmp(type, "bios")) { + ogp_reg_sel = OGA1_XP10_BPROM_REG_SEL; + ogp_reg_siso = OGA1_XP10_BPROM_SI; + ogp_reg__ce = OGA1_XP10_BPROM_CE_BAR; + ogp_reg_sck = OGA1_XP10_BPROM_SCK; + } else if (!strcasecmp(type, "cprom") || !strcasecmp(type, "s3")) { + ogp_reg_sel = OGA1_XP10_CPROM_REG_SEL; + ogp_reg_siso = OGA1_XP10_CPROM_SI; + ogp_reg__ce = OGA1_XP10_CPROM_CE_BAR; + ogp_reg_sck = OGA1_XP10_CPROM_SCK; + } else { + msg_perr("Invalid or missing rom= parameter.\n"); + return 1; + } + + get_io_perms(); + + io_base_addr = pcidev_init(PCI_VENDOR_ID_OGP, PCI_BASE_ADDRESS_0, + ogp_spi); + + ogp_spibar = physmap("OGP registers", io_base_addr, 4096); + + /* no delay for now. */ + if (bitbang_spi_init(&bitbang_spi_master_ogp, 0)) + return 1; + + buses_supported = CHIP_BUSTYPE_SPI; + spi_controller = SPI_CONTROLLER_OGP; + + return 0; +} + +int ogp_spi_shutdown(void) +{ + physunmap(ogp_spibar, 4096); + pci_cleanup(pacc); + release_io_perms(); + + return 0; +} |
